MM525

Site: MM525	Land Unit: Dixie Basalt
*Aust. Soil Class.:* Ferric-Sodic, ?, Brown CHROMOSOL (confidence level 3)

General Land Unit Description:
The undulating rises in the Dixie–Staughton Hill area, south of Terang, consist of Ferric-Sodic Brown Chromosols on mid and lower slopes and Mottled Brown Chromosols on mid and upper slopes. Shallow Chromosols and patches of redder soils occur on the crater lip and around the maar rim.

Site Description:

Geology: Quaternary basalt	Landform pattern: Undulating rises
Position in landscape: Upper slope	Internal drainage: Imperfectly drained

Soil Profile Morphology

A1	0-20 cm	Very dark greyish brown (10YR3/2) clay loam, hard setting surface, structure-less, firm consistence when dry, pH 5.2. Clear transition to:
A2	20-35 cm	Sporadically bleached when dry (10YR7/2) clay loam, weak consistence when dry, ferromanganiferous nodules are common. Sharp transition to:
	Subsoil
B21	35-50 cm	Yellowish brown (10YR5/4) medium clay, yellowish brown mottles, strong blocky structure (10-20 mm), many ferromanganiferous nodules, pH 6.0:
B22	50+ cm	Yellowish brown (10YR5/4) medium clay, yellowish brown mottles, blocky structure, many ferromanganiferous nodules, pH 6.1.

Key profile features:

Strongly acidic topsoil
Many ferromanganiferious nodules in subsoil
Mottled subsoil
Subsoil dispersive when worked when wet

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